body{
  margin: 0;
}

ul{
  margin: 0;
  padding: 0;
  list-style: none;
}

a{
  text-decoration: none;
}

img{
  width: 100%;
  height: 100%;
}

.slider-wrap{
  width: 996px;
  height: 480px;
  border: 1px solid black;
  margin: 50px auto;
}
.slider{
  float: left;
  width: 853px;
  height: 480px;
  position: relative;
}
.slider .slider-item{
  position: absolute;
  top: 0;
  left: 0;
  width: 853px;
  display: none;
}
.slider .slider-item.active{
  display: block;
}

.thumbs{
  float: left;
  width: 142px;
  height: 80px;
}
.thumbs .thumbs-item{
  height: 80px;
  opacity: .5;
}
.thumbs .thumbs-item.cur{
  opacity: 1;
}